ON 20080108@7:38:51 AM at page: http://www.piclist.com/techref/io/stepper/linistep/index.htm# James Newton[JMN-EFP-786] edited the page. Difference: http://www.piclist.com/techref/diff.asp?url=H:\techref\io\stepper\linistep\index.htm&version=60 ERROR: Can't email. Cannot send after shutdown. ON 20080113@10:20:56 AM at page: http://www.piclist.com/techref/io/stepper/linistep/faq.htm#39460.4311921296 [kenny_saltiel-comverse-] Questions: Hi,
I purchased 2 boards and finished constructing the first one, which is bolted to a bracket and large heatsink. While testing with a 3.2v 2A stepper on my mill, the bracket seems to get too hot. I replaced the 1 ohm resistors with 0.5 ohm 10w resistors and am driving the board at 24v. Within about a minute, the bracket the transistors are mounted on, gets so hot I can't touch it with out getting burned.
I have a 42cfm fan blowing directly on the heatsink but it can't cool fast enough. I'm afraid to burn out the board so I turn it off after 1 minute.
While it is working (for that minute) it works perfectly on full-step and half-step. Haven't tested micro-stepping.
Am I doing something wrong or is my setup too power hungry for this board?
Thanks.
ON 20080114@10:46:08 AM at page: http://www.piclist.com/techref/io/stepper/linistep/faq.htm#39460.4311921296 [kenny_saltiel-comverse-] Replied to post 39460.4311921296 by kenny_saltiel-comverse- |Insert 'I guess I'll answer my own question. As documented elsewhere on this site, the difference between the motor voltage and the supplied voltage is translated to heat. I experimented with lower voltages for my steppers, and it seems that 15v will be sufficient. At this voltage, the board remains cool with my heatsink and fan. Kenny.' at: '' kenny_saltiel-comverse- asks:
Hi,
I purchased 2 boards and finished constructing the first one, which is bolted to a bracket and large heatsink. While testing with a 3.2v 2A stepper on my mill, the bracket seems to get too hot. I replaced the 1 ohm resistors with 0.5 ohm 10w resistors and am driving the board at 24v. Within about a minute, the bracket the transistors are mounted on, gets so hot I can't touch it with out getting burned.
I have a 42cfm fan blowing directly on the heatsink but it can't cool fast enough. I'm afraid to burn out the board so I turn it off after 1 minute.
While it is working (for that minute) it works perfectly on full-step and half-step. Haven't tested micro-stepping.
Am I doing something wrong or is my setup too power hungry for this board?
Thanks.
ON 20080115@10:32:51 AM at page: http://www.piclist.com/io/stepper/linistep/gallery.htm#39461.2316435185 James Newton[JMN-EFP-786] removed post 39461.2316435185 |Delete 'ferooz_zhunu@hotmail.com
Dear sir
I, Abdul Ferooz Khan Managining Director of Marjan training Centre Limited. My main business is to proivide training for overseas placement.I need a cnc machine for training.Pls provide your cataloge & price.
Cell no 0088 01713083018
mail - ferooz_zhunu@hotmail.com

Thanks with best regards
Ferooz
' ON 20080117@3:54:24 PM at page: http://www.piclist.com/techref/io/stepper/linistep/index.htm#39464.2343518519 James Newton[JMN-EFP-786] Published and replied to post 39464.2343518519 by tratincica-spinter- |Insert 'I'm not sure what .hex file you are referring to. The source code is available for p16f84A or p16f628 at http://www.piclist.com/techref/io/stepper/linistep/lini_asm.txt. You need MPASM from Microchip to compile it. The clock does not have to be 20MHz, but it may miss very fast step pulses with a clock that is too slow.' at: '' tratincica-spinter- asks:
I'm dumb or whatever...?! At least, I didn't deal with PIC's in whole my life... :-) Anywhere, I'm trying to find out which PIC is appropriate for the *.hex file you gave to us!? IS that 16F84, 16F84A, 16F628 or 16F628A and do we have to use only 20MHz MCU's? Please be patient and answer these question for dummy!
greetings
|Delete 'P-' before: '' but after: 'tammy3419@yahoo.com asks: " Could the circuit be applied to an bi polar motor ? your reply would be greatly appreciated thanks"
  • ' ON 20080117@3:56:51 PM at page: http://www.piclist.com/techref/io/stepper/linistep/index.htm# James Newton[JMN-EFP-786] edited the page. Difference: http://www.piclist.com/techref/diff.asp?url=H:\techref\io\stepper\linistep\index.htm&version=66 ON 20080117@3:58:31 PM at page: http://www.piclist.com/techref/io/stepper/linistep/index.htm# James Newton[JMN-EFP-786] edited the page. Difference: http://www.piclist.com/techref/diff.asp?url=H:\techref\io\stepper\linistep\index.htm&version=67 ON 20080117@11:51:06 PM at page: http://www.piclist.com/techref/io/stepper/linistep/index.htm#39464.6627662037 [tratincica-spinter-] Replied to post 39464.6627662037 by JMN-EFP-786 |Insert 'I reffered to http://www.piclist.com/techref/io/stepper/linistep/lini_01.hex hex file. It's already compiled but I do not know what PIC type I have to use with this compiled file. I have no MPASM neither do I know deal with it. I've just planned to use your hex file... sorry for bad english and thank you for replying.' at: '' James Newton replies: I'm not sure what .hex file you are referring to. The source code is available for p16f84A or p16f628 at http://www.piclist.com/techref/io/stepper/linistep/lini_asm.txt. You need MPASM from Microchip to compile it. The clock does not have to be 20MHz, but it may miss very fast step pulses with a clock that is too slow. ON 20080118@3:44:47 AM at page: http://www.piclist.com/techref/io/stepper/linistep/index.htm#39464.6627662037 [tratincica-spinter-] Replied to post 39464.6627662037 by JMN-EFP-786 |Insert 'Sorry for misplacing my reply: again: I've reffered to http://www.piclist.com/techref/io/stepper/linistep/lini_01.hex hex file. It's already compiled but I do not know what PIC type I have to use with this compiled file. I have no MPASM neither do I know deal with it. I've just planned to use your hex file... sorry for bad english and thank you for replying' at: '' James Newton replies: I'm not sure what .hex file you are referring to. The source code is available for p16f84A or p16f628 at http://www.piclist.com/techref/io/stepper/linistep/lini_asm.txt. You need MPASM from Microchip to compile it. The clock does not have to be 20MHz, but it may miss very fast step pulses with a clock that is too slow. tratincica-spinter- replies: I reffered to http://www.piclist.com/techref/io/stepper/linistep/lini_01.hex hex file. It's already compiled but I do not know what PIC type I have to use with this compiled file. I have no MPASM neither do I know deal with it. I've just planned to use your hex file... sorry for bad english and thank you for replying.

    ON 20080120@6:06:11 PM at page: http://www.piclist.com/techref/io/stepper/linistep/index.htm#39464.9938078704 James Newton[JMN-EFP-786] Replied to post 39464.9938078704 by tratincica-spinter- |Insert 'Actually I'd forgotten about that one.. That file is for the 628.' at: '' tratincica-spinter- replies: I reffered to http://www.piclist.com/techref/io/stepper/linistep/lini_01.hex hex file. It's already compiled but I do not know what PIC type I have to use with this compiled file. I have no MPASM neither do I know deal with it. I've just planned to use your hex file... sorry for bad english and thank you for replying. ON 20080120@6:06:40 PM at page: http://www.piclist.com/techref/io/stepper/linistep/index.htm#39465.156087963 James Newton[JMN-EFP-786] removed post 39465.156087963 |Delete 'tratincica-spinter- replies: Sorry for misplacing my reply: again: I've reffered to http://www.piclist.com/techref/io/stepper/linistep/lini_01.hex hex file. It's already compiled but I do not know what PIC type I have to use with this compiled file. I have no MPASM neither do I know deal with it. I've just planned to use your hex file... sorry for bad english and thank you for replying

    ' ON 20080121@12:24:35 AM at page: http://www.piclist.com/techref/io/stepper/linistep/index.htm#39467.7542824074 [tratincica-spinter-] Replied to post 39467.7542824074 by JMN-EFP-786 |Insert '. Thank you for fast and accurate info. I'll post here pictures of my hardware and feedback infos when complete linistep (3x). Greetings from Serbia' at: '' James Newton replies: Actually I'd forgotten about that one.. That file is for the 628. ON 20080123@10:01:51 AM at page: http://www.piclist.com/io/stepper/linistep/faq.htm#39470.1791435185 James Newton[JMN-EFP-786] Published and replied to post 39470.1791435185 by dbroadwell |Insert 'Sure. But it will require a solid understanding of electronics on your part.' at: '' dbroadwell@gmail.com asks:

    I'm considering using the Linstepper for a azmith/elevation antenna project. For the elevation I have two motors that are mechanically in parallel and (hopefully) can both drive at the same time. As they are both mid size motors (of the same model number and rating 5.1V@1A) I was hoping to accomplish this with one linstepper and possibly changes to the driver transistors. Is this possible?
    |Delete 'P-' before: '' but after: '